Otiluke's Fire and Ice

When the spell is cast, a red crystal sphere immediately appears before the caster, then flies away at great speed toward a targeted area. A split second later, a blue crystal sphere appears and quickly follows behind the red sphere. When the red sphere reaches the area chosen by the caster, it explodes in a fireball 30 feet in radius, inflicting 4d4 points of fire damage upon all within the area of effect. A successful saving throw vs. spell reduces the damage by half. A split-second later, the blue sphere explodes in the same area of effect, inflicting 4d4 points of cold damage upon all within a 30-foot radius. Those who made the saving throw against the fire take only half damage from the cold blast, but those who failed the saving throw against the fire take full damage from the cold. Note that, as with fireball, premature impact explodes the spheres immediately.

The greatest effect of the one-two attack combination is the tremendous shock inflicted upon inanimate objects by the radical change in temperature. All exposed items in the area of effect save as non-magical items vs. crushing blow. Failing this saving throw causes most materials to crack or shatter.

The material components are a pinch of phosphorus and a small quartz crystal.

Notes: Uncommon or rare spell (WoG).